Staurosirella leptostauronvar. dubia (Grun.) Edlund
Length:18

 Width:5

 Striae:9






























Collection 1341a

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Authority information

For new variety combination, see Edlund (1994). For genera transfer see Williams and Round (1987).

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Originally, the pictured specimen was identified as Fragilaria leptostauron var. dubia by (Stoermer and Yang 1969) and the following information refers to this taxon. Fragilaria leptostauron var. dubia lacks the expanded central area that is characteristic of the nominate (Patrick and Reimer 1966). The valves have a elliptical-lanceolate shape, although the central area varies in width (Patrick and Reimer 1966)
  • Synonyms(Patrick and Reimer 1966)
    Fragilaria harrisonii var. dubia Grun. 1862.
    Fragilaria leptostauron var. dubia (Grun.) Hust. 1931.
  • Ecology

    Size ranges and morphology

  • Length is 10-15 micrometers (Patrick and Reimer 1966).
  • Breadth is 3-7 micrometers (in middle of valve) (Patrick and Reimer 1966).
  • Striae range is 6-11 per 10 micrometers (Patrick and Reimer 1966).